How to Change Spark Plugs

Keep your engine in good working order. Here’s how to change spark plugs.

To some, a car’s engine may seem like an impossibly complicated hunk of mystical machinery. While that’s not too far from the truth for many modern engines, there are still some easily serviceable items on even the most high-tech cars. Spark plugs, especially, are among the easiest parts to replace in any given engine. All it requires is carefully following some basic steps and a handful of basic tools.

Before we dive into the step-by-step process, you might be wondering how often you need to change your spark plugs, what sort of spark plugs you should use, or whether you need to upgrade your spark-plug wires or other ignition components. Fortunately, these questions are easy to answer. And don’t forget, you may need to replace your spark plug wires every time you change your spark plugs depending on your driving style.

But chances are, if you’re here, it’s because you know it’s time to change your spark plugs. So let’s get started.

Holding spark plugs

Difficulty

Good for beginners: A new DIYer will be able to complete the project

Estimated Time Required

One hour

What You’ll Need to Change Spark Plugs

Remember, you can always rent tools from us.

 

Step-by-Step Guide

Step 1: Once you’ve gathered all of the tools you need, as well as the correct spark plugs for your car and spark plug wires (if necessary), you may want to drape an old blanket or towel over the fenders of your car so that you won’t mar the paint as you lean into the engine bay. It’s also good practice to disconnect the positive terminal on your car battery when working on anything electrical.

Pro Tip: Be sure to let your car’s engine cool thoroughly before replacing your spark plugs, and keep any flammable blankets, towels, or shop cloths away from any surfaces that may still be warm. This will also ensure the new spark plugs are tightened correctly (heat expands the engine threads and limits torque).

Step 2: Thoroughly clean the area around your spark plugs. Once you remove the spark plug, you’ll have an open hole directly into the inside of your engine, and any dirt or debris around the spark plug can fall straight in and cause serious wear or damage to your engine—something that should be avoided, for obvious reasons.

You can use compressed air to blow the area clean, and/or a cleaner/degreaser spray and shop towels to loosen and remove any gunk around the spark plug. Be sure to wear eye protection if you’ll be using compressed air or a spray cleaner.

Once you have the area around each spark plug clear of any oil, dirt, or other debris, it’s time to start the actual replacement process.

Step 3: Keep everything in order by removing a single spark plug wire from one spark plug at a time. This prevents you from reconnecting the wrong wire to the wrong plug when it’s time to button everything back up.

Step 4: Once you’ve removed the first spark plug wire, fit the necessary combination of extensions and swivels to the spark-plug socket to comfortably fit the tool to the spark plug.

Turn the spark plug counterclockwise until it comes free.

Even though you cleaned around the spark plug thoroughly before beginning, take care not to knock any previously unseen debris into the now-open hole into your engine’s interior.

Step 5: Once the spark plug is out, take the new spark plug and use the spark plug gap tool to check that there is a proper gap between the outer (hook-shaped) ground electrode and the center electrode. Most modern spark plugs are properly gapped from the factory, but shipping and handling can result in this small but crucial gap being tweaked, so it’s always good to ensure the gap is correct before installing.

If any adjustment is needed, gently open or close the gap until the tool just fits at the correct gap (which should be specified in your owner’s manual).

Step 6: With the gap verified, carefully insert the plug into the open hole by hand. If your spark plug isn’t factory treated with anti-seize, you can rub a small drop of anti-seize lubricant on the spark plug thread so it doesn’t lock up from the heat. Gently start screwing the plug in with a clockwise rotation, ensuring the threads are properly mated.

Pro Tip: Be careful to avoid cross-threading the spark plug when re-installing, as any damage to the spark-plug threads could require costly repairs to your car’s cylinder head.

Once the spark plug is carefully started into the threads, continue tightening the plug down with the spark plug socket and ratchet/extension combination. Be very careful not to over-tighten your spark plugs! Just tighten it down until the spark plug’s washer is firmly in contact with the shoulder of the threaded hole and the washer is slightly compressed.

Step 7: With the spark plug securely re-installed, reattach the plug wire by twisting slightly as you push the boot back down onto the exposed tip of the plug until you hear and feel a firm click. That means you’ve properly seated the plug wire. You can put a drop of dielectric grease inside the plug boot for better heat dissipation.

Step 8: Repeat the process in Steps 2 through 7 for each of your remaining spark plugs until you’ve replaced them all. If you’re also replacing your spark plug wires, go back and do each one in the same order, one at a time. You’ll notice that the spark plug wires vary in length according to their proper installation position, so be sure to match each wire up to the existing wire before removing the old one and replacing with the new wire. Repeat until all the wires are replaced.

You’re done! Before you celebrate, however, be sure to mark down the car’s current mileage in your maintenance notebook, so you’ll know when you need to change your spark plugs again.

What You Need to Know About Engine Misfires

Engine misfires can be a mysterious, frustrating problem—and information around them often makes them sound worse than they are. The symptoms vary by vehicle but are usually described as a stumble or brief hesitation in power delivery. An engine misfire can be temporary or continuous and will sometimes generate a check-engine code. But don’t be alarmed. Though it seems like an expensive fix, it usually doesn’t have to be. Read on as we demystify misfires.

Vehicle engine bay

What is a Misfire?

First, let’s examine what causes a misfire. You already know an engine needs three components to fire the cylinder: fuel to ignite, oxygen to burn that fuel, and a spark to ignite the mix. Take away any of those elements, and the cylinder will not produce the expected bang. That sounds like an easy enough diagnosis, but other cylinder misfire causes are due to incorrect ignition timing, vacuum leaks, or valve spring wear.

If your engine is misfiring, it’s best to find the problem and fix it as soon as possible. Misfires reduce gas mileage and increase emissions, which can cause you to fail an emissions test. More seriously, cylinder misfires can cause damage to other engine parts, like the oxygen sensors or catalytic converter. Let’s look at what to do when diagnosing this issue.

When It’s the Spark

Ignition parts that control spark to an engine are primarily wear parts that are designed to provide maximum performance for their service life, then be replaced as needed. As these parts wear or corrode, they will gradually increase impedance to the point that little or no electricity makes it to the spark plug to ignite. Since this happens over time, you may initially have small intermittent misfires you don’t even notice that gradually get worse over time. This is a big clue that your misfire is caused in the ignition system, so start there. Fortunately, most of these items are affordable and easy to quickly replace.

Spark plugs are cheap and easily swapped in just a few minutes. Ignition wires that are old can show signs of wear and are simple to replace as well. Older vehicles with a traditional distributor might just need a new cap and rotor. The coil packs on modern vehicles are less affordable but are still easily serviced.

When It’s the Fuel

After the ignition system is checked out, move on to the fuel system. Parts here typically last longer but still wear out. Perhaps just the fuel filter is clogged, or the fuel injectors are dirty. If those are good, the fuel pump or the mass airflow sensor may be starting to fail.

The EGR valve might be sticking with age, letting exhaust dump into the intake manifold. Emissions systems are precisely designed, and spent exhaust in the wrong part of the ignition cycle will cause issues. Or maybe you are lucky and just filled up with a tank of bad gas.

Fuel-system misfire symptoms will suddenly appear and are often more noticeable at idle than at highway speed. If your engine is chugging at a stoplight but smooth at speed, take a hard look at the fuel system.

When It’s Mechanical

Engine misfires can also be a little more complicated. Check the vacuum lines connected to the intake manifold. Look for cracks and replace lines if you find any problems. Also check the condition of intake manifold gaskets, especially around the throttle body. Take a timing light under the hood to make sure the timing belt or chain has not slipped or jumped. Finally, pop off a valve cover and have a close look at the valve train for any obvious damage.

Unlike fuel misfire symptoms, mechanical misfire symptoms will not go away with higher engine speeds, and often get worse. The misfire can be serious enough to cause noticeable vibration in the cabin, or even backfires. By this point, your engine’s PCM should show a code.

About That Check Engine Light

If you have a “Check Engine” light, your car’s computer is storing information about what problem was detected. The great thing about diagnostic codes is that they can be very specific, even often narrowing down which cylinder is misfiring. That’s less time spent hunting down the problem, so it makes sense to use a code reader to get to the root of the problem.

Have you ever solved a misfire problem? Tell us your solution and advice in the comments below!

Offbeat Car-Related Collections

Unique collections – and the people who own them

Some people collect coins. Others collect stamps. Still others collect spoons or rocks or napkins or doorknobs – or a multitude of other quirky objects. Advance Auto Parts, though, went in search of people who have collections that are related to cars that are both offbeat and interesting.

We decided to focus on three of the most intriguing, each quite different and unique:

  • The first is an international repurposing project that is turning 1,041 rusty old hubcaps into incredible museum-quality pieces of art.
  • The second reveals a lifelong love of a highly underrated car part: the spark plug.
  • The third one – well, if you’re super squeamish, proceed with caution.

Metal canvases: recycling hubcaps into fine art

“I have found that the fine artists I have worked with on this project do not even flinch when looking at this white round disc of metal canvas. And why should they. Artists from the beginning of time have used cave walls (Lascaux, France and Altamira, Spain), walls of pyramids (Egyptians), animal skins (American Indians), etc… as their canvas.” (Ken Marquis, LandfillArt founder)

Ken Marquis, the genius behind the idea of hubcap art, says that he had a “Eureka! moment” five years ago while attending a car show in Pennsylvania. He had picked up a rusty old hubcap and suddenly imagined it serving as a canvas for a beautiful piece of art. That day, he was able to get 41 hubcaps from the 1930s through the 1970s for $2 each. Three weeks later, he obtained 1,000 more hubcaps; so, the “magic number” of artists and art projects needed was set at 1,041.

This meant that Ken needed to find 1,041 artists who were willing to take a cleaned and primed hubcap and transform their discs of metal into stunning pieces of art. “Fortunately,” Ken says, “I’ve been an art dealer for 40 years and am heavily involved in the art community with lots of artist friends. So, I decided to first knock on the doors of friends of mine and ask them to repurpose a metal disc into great art.”

When the first two or three pieces came back, looking spectacular, Ken realized that “this project could become something quite special” and so he knocked on more doors; created a 501(c)(3) organization; built a website; and then spent a substantial amount of time looking for artists “who might embrace this project.”

Fast forwarding to today, Ken now has more than 950 pieces of completed art; once he has all 1,041 pieces, he will have one or more from every state in the country and from 52 countries from around the world, creating what Ken calls “the largest artist initiative ever achieved.”

The majority of the artists have used oil or acrylic paint to create art, but others craft the metal into sculptures or weave, glue, screw or weld other materials onto the hubcap to create something brand new and eye-catching. “Each has a unique creative edge and style as each artist views a hubcap through a different set of eyes. Some incorporate only part of the hubcap or several pieces of the hubcap, while another incorporates multiple hubcaps. The largest piece of art weighs more than 6,000 pounds and is more than seven feet tall.”

The response from artists was quite positive. “Many of them hadn’t worked in the round before or hadn’t worked on metal or hadn’t used hubcaps as a canvas. But they enjoy being creative with something new and unfamiliar. They enjoy the challenge. They also like how environmentally friendly this project is. It’s really the perfect recycling/reclamation art project.”

And, where are all of these pieces of art?

“The good news,” Ken says, “is that for the time being, I have room to store them in a heated second floor with lots of wall space. This collection is not officially open to the public but I occasionally take people to see the art.” For those of us not lucky enough to receive a personal invite, a photo of each hubcap is posted on the site.

Ken will be writing a book about the project, and the book will contain a professional photo of each hubcap. There will also be a traveling show so that more people can see the art. His first museum stop will be in September 2014 at an “astute, well established museum, not located in New York but located east of the Mississippi.” Ken couldn’t tell us any more since the museum itself wants to break the news. The exhibit, containing 250 to 300 pieces of hubcap art, will hang in the museum for six months.

Not bad for a project that started with one crazy Eureka! moment . . .

Car swap meet sparks a lifelong interest

When Ed Laginess was eight or nine years old, he attended a car swap meet with his father and helped him hunt for needed parts. While there, young Ed spotted some spark plugs in a box; since they were only 25 cents apiece, he bought a few.

At another swap meet, he bought a few more – and then a few more. “Before I knew it,” Ed says, “I had 2,000 different spark plugs.”

Not surprisingly, he ended up joining the Spark Plug Collectors of America, Inc., the not-for-profit international organization created in 1975 for the “promotion of spark plug collecting, the research and preservation of spark plug history, the exchange of information and spark plugs, and fostering fellowship among club members worldwide.”

“Through this club,” Ed says, “I now have friends from all over the world, and I trade, buy from and sell to them.” He estimates that there are 400 to 500 club members, adding that there are many more collectors who have not yet joined the club. “If you name a country,” he adds, “there is probably a collector there.” Most club members, though, live in the United States, Europe or Australia.

By now, you’re probably wondering what we were wondering: what is the fascination with spark plugs? “Back when cars were a newer idea,” Ed explains, “everyone tried to outdo one another when they created spark plugs. There were hundreds and hundreds of brands to choose from with more than 1,000 car manufacturers at the time.”

Some of the coolest spark plugs, Ed says, include those that:

  • have a 24k gold base so that the spark plug will last the lifetime of the vehicle
  • have a little glass window so that you can see the sparks
  • are made of colorful porcelain, sometimes jewel-toned, multi-colored and “pretty fancy”
  • have brass bases
  • have handles on them so that they could be cleaned and reused
  • contain pictures, such as one of a lady dressed in red white and blue in 1700s-style clothing
  • feature fancy logos

Then there are the ones with “weird funky looking electrodes, floating balls or spinning fans. You know. Nutty stuff.”

Values range, Ed says, from about 50 cents apiece to about $2,000 (really? wow).

Early cars, of course, did not even have spark plugs. Instead, the internal combustion engines from the 19th century relied upon complicated and erratic flame and igniter ignitions. According to Gas Engine Magazine, the first spark plug probably originated in France with a ruby mica insulator, a brass body and the markings of “A.E.C.” A mystery! Nobody seems to know what those letters represent but the birth of the spark plug clearly foretold the death of the igniter.

By the early 1900s, more than 5,000 different brands of spark plugs were finding their way into Henry Ford’s Model Ts, including “For-A-Ford, Janey Steimetz & Company Flashlight, For 4 One, just to name a few.”

Insulation materials ranged from mica to stone to various kinds of porcelains, the latter of which often failed because of the extreme engine temperatures and porcelain’s porous nature, which allowed them to easily become clogged – an even more frequent event then than today, as early gasoline contained more oils and more closely resembled modern kerosene.

The year 1915 was pivotal. That’s when the Frenchtown Porcelain Company created a type of material that worked well as spark plug insulation material; in 1933, the discovery of silimanite extended the life of the plugs. From about 1900 until the mid-1930s, at least 6,700 spark plug manufacturers put their hand in the game, with more than 2,000 US patents filed on spark plugs, including “lots of gimmicks and gadgets.”

Because so many brands once existed, Ed says that “it’s fun to try to find the huge, the weird looking and the very rare spark plugs. I’m fascinated by their design.” When asked what kind of people are attracted to this type of collecting, he answers, “People who like mechanical things, old cars, old tractors, old hit and miss engines. The gearheads.”

Ed has so many spark plugs that he maintains a small museum full of memorabilia behind the house. “I’m sucked in,” he admits. “It’s addictive.”

Last Collection is Tough to Swallow

Steve Silberberg collects barf bags. Yes, those little bags that, when you can’t get to the bathroom in time, you vomit into. He owns some that were manufactured for use on airplanes, others for use in cars. To be polite and politically correct, you can call them air sickness or car sickness bags, but those nicer names don’t make their purpose any more likely to be appropriate topics at a tea party.

And, while you might think that Steve is the only one with this idea, he shares that there are “about 100 people who collect these bags somewhat seriously,” with “somewhat seriously” defined as having 50 or more bags. “Sure there could be people who have a couple of these bags come their way,” he adds, “but once you get to 50 or more, you have a collection.” (Steve, by the way, has approximately 2,500!)

Like baseball cards and other more socially acceptable collections, Steve trades bags with other collectors around the world. “About one third of the collectors – remember that there about 100 of us – live in Germany, with some living in the United States and others in Great Britain.”

When asked why sickness bags seem to be a more appealing type of collectible to Germans (as compared to other nationalities), Steve has a good explanation. “My opinion,” he says, “is that because a six-week vacation is standard in Germany, they travel a lot. So, to show how great their travels are, some Germans collect these bags.”

Steve has met two other barf bag collectors in person while he lived in Dallas, getting together with them to examine one another’s collections in a restaurant. “We got some interesting looks from the people around us,” he recalls. “I guess a restaurant isn’t a good place to share these types of bags.”

Otherwise, these collectors communicate via the Internet. “I’d love to say we party,” Steve says, “but we’re not the partying type. I was an early adopter of the Internet and I created a website for my collection. So, other collectors would find me. Now, anyone who has a sizable collection creates a web page and we find each other.” They also have a “pretty informal” Yahoo group which, at the time this blog post was being written, had 90 members.

Steve includes photos of his bags on his website; on this page, the top two bags are from Avis Car Rental:

  • The top one is from approximately 1993 and contains their slogan, “We Try Harder”
  • The next one has apparently only been available at the Nassau or Freeport Bahamas airport. Advertising messages include:
    • Call for a sparkling new Plymouth
    • Free unlimited mileage (Steve points out that, although that sounds fantastic, all 700 Bahama Islands put together equal the approximate size of Connecticut)

We at Advance Auto Parts still had two more questions for Steve. First, how do people react when they discover what he collects? And, which barf bag is his favorite?

“I get two different types of reactions,” Steve explains, “and I find them to be a litmus test about whether or not we’ll get along. Some people will be fascinated, perhaps not quite believing me, but finding it pretty cool. Other people have a look on their faces that clearly says “why do you do that??’ and I know that I won’t get along with them quite as well.”

As far as favorites, he lists three (breaking the rule about listing only one favorite but, oh well):

  • Finn Aviation air sickness bag from Finland: “Most of these bags come with written instructions, but this one only has a cubism reindeer that is spewing chunks. It’s pretty cool, a real art piece and, with this bag, there are no language barriers.”
  • MINI Cooper car sickness bag: “This is an advertising piece. Cars don’t automatically come with one.”
  • Space shuttle bag: “This is the highlight of my collection.”

Before we go, we’d like to highlight three parts of Steve’s website that made us smile:

  • Those who donate a bag to the museum become a Patron of Puke
  • Two pieces of barf art are available to enjoy
  • Although we don’t normally highlight items for sale, this site has a “gift shoppe” with a sickness bag poster (it was the “pe” at the end of “shop” that, in conjunction of what is available to purchase, got us to laugh)

As a bonus: here’s the most well-known pop culture moment related to spewing.

What about you? What intriguing car-related items do you collect? What other unique collections have you seen? Share in the comments below.

Spark plugs, a comic book and a smoke bomb

Rural Tales Photo -- NGK_Laser Iridium_Spark Plug_SThe ad in my 1977 comic book promised a smoke bomb that would deliver “surprise as smoke pours from under the hood.” At 13 years old, I thought I knew a lot about cars. My sister would soon pay the price for both misconceptions.

It had been three years since my last ill-conceived prank involving a vehicle. That one hadn’t ended well either. Crab apples littering the ground in woods along the country road, a lone, old pickup driving slowly by, and a dare that I couldn’t hit it helped me learn just how fast an angry adult can chase you down when you mess with their vehicle.

The smoke bomb arrived in the mail, addressed to me and discreetly packaged, as promised. At five inches long, it looked a little like a thin cigar and was wrapped in red, white, and blue paper with two copper wires protruding from the end. The instructions were simple – attach the wires to the vehicle’s spark plugs and watch as panic overtakes the driver when smoke pours from the engine compartment at start up.

I knew how to change spark plugs, or so I thought, so installing the smoke bomb on my sister’s 1974 Ford LTD Country Squire Station Wagon was a snap. When it was time for her to leave for work, I hid in the pine trees, barely able to contain my excitement as I watched the door close and heard the engine start. This was it! Smoke would soon pour from the engine compartment. She’s putting the car in reverse. She’s backing down the driveway. She shifts to drive. Uh-oh. There she goes. No smoke. No one screaming “the car’s on fire!” Nothing, except a letdown, and regret that I didn’t order the “keep on trucking” t-shirt with the big red tongue instead of a stupid smoke bomb that didn’t work. What could possibly have gone wrong?

I removed the smoke bomb from her car the next afternoon and tossed it into my dresser drawer along with other discarded treasures. Little did I know, the fun was just starting. See, I had no idea that it actually mattered which spark plugs were connected to which wires. In the course of installing and removing the smoke bomb, I’m sure I had removed all eight wires and reconnected them in no particular order – something my sister found out later that day, sitting on the side of the road, wondering why the car was running so poorly.

Luckily, she actually knew something about cars, unlike me, and figured out that the plug wires were connected wrong. She fixed them and was on her way. When she came home she asked me about it I confessed to the whole scheme, in part to prevent her from telling my dad and seeing smoke pour from under his lid! That’s when she gave me an education about how to change spark plugs, and that spark plugs, wires and cylinders had to be connected to the proper distributor terminal.

I decided then and there that it would be the end of my car capers—a declaration helped by the impending arrival of Sea Monkeys and Mexican Jumping Beans on yet another order from the back of the comic book.

Now that I know how to replace spark plugs, and that the different types of spark plug metal—such as copper, iridium, and platinum—actually matter, I always think about the smoke bomb that wasn’t…whenever I’m showing someone else how to replace spark plugs.

Editor’s note: Put the comic book down and head on over to Advance Auto Parts for all the best in spark plugs, batteries, brakes and more. Buy online, pick up in store.Gag gifts

 

Spark Plug Basics: Your Questions Answered

Your engine relies on spark plugs every day—which means you do, too. So it’s about time we get familiar with these key maintenance parts. You might be wondering how often you need to change your spark plugs, what sort of spark plugs you should use, or whether you need to upgrade your spark-plug wires or other ignition components. Fortunately, these questions are easy to answer. Read on to learn about spark plugs.

Spark Plugs

What do spark plugs do?

Unless you’re driving an electric car, in which case this article definitely isn’t for you, you’ve got what’s known as an ICE or “internal combustion engine.” Now, combustion requires a spark. Spark plugs are a crucial part of your engine because they’re what makes that combustion happen, both at ignition and while the engine moves through each combustion cycle during operation. When the plugs aren’t doing their job, your engine’s not getting the full combustion benefit. Everything from acceleration and fuel economy to engine smoothness is going to be negatively affected.

How do I know when to replace spark plugs?

Your spark plugs should be changed at the interval given in your owner’s manual, typically every 30,000 miles. If no interval is given, or if you recently bought the car and aren’t sure when the spark plugs were last replaced, or if your car is showing symptoms of failing spark plugs or ignition issues (trouble starting, misfires, or rough idle), you’ll want to replace them. Replace them every 20,000 to 40,000 miles in the future, depending on your vehicle type and your use case.

If you have a high-performance sports car that regularly sees high revs, you will want to change your spark plugs more often. If you drive at moderate speeds and under moderate acceleration, your plugs may last 40,000 miles or more while still operating efficiently. Because spark plugs are cheap, however, and easy to replace, it’s good insurance to change them sooner than later, no matter what vehicle you own or how you use it.

How can I check to see if the spark plugs need replacing?

As a general rule of thumb, if something seems funny about your engine, you should check the spark plugs first. If you’re a hands-off kind of car owner, of course, you’ll just take it to your mechanic and get it diagnosed. But if you want to inspect the plugs yourself, it’s a pretty easy job.

Check your owner’s manual to find out where the plugs are located, and then pop the hood and have a look. If the plugs appear dirty, that could mean you’ve got an oil leak or excessive carbon deposits. And if they look damaged, your engine might be running too hot or misfiring.

Keep in mind, though, that even if your spark plugs look fine, they might be past their prime. Consult your owner’s manual for when to replace spark plugs. If you think you’re past due, we recommend replacing them, just to be safe.

Can I replace my own spark plugs?

Although you can check them, you may want to have someone else replace them. Truth is, for a seasoned backyard mechanic, popping the old plugs out and putting new ones in is pretty straightforward. But if you haven’t done it before, you should probably have someone looking over your shoulder the first time through.

There’s some serious wrenching going on here—literally. You’ll need a number of tools to complete the job. You need a socket wrench, and you may need a specific spark-plug socket and other accessories as well. Plus, there’s a fairly advanced technique called “gapping” that may or may not be required, depending on your vehicle’s age and other factors.

Wait for the engine to cool off first before attempting any replacement. We’re talking four hours, minimum. Those plugs are responsible for combustion, remember? Better safe than scalded.

What spark plugs do I need?

As for which type of spark plugs you’ll need, most folks will want to stick with the plugs recommended in their owner’s manual. For more info, here’s a ton of detail on the different types of spark plugs.

What about cleaning spark plugs?

You’ll find various home remedies for cleaning spark plugs, but for peace of mind, we recommend just swapping them out if they’re that dirty. But it’s your call on that front. From a money perspective, spark plugs are a car owner’s dream, because they’re an essential engine part that’s also inexpensive.

Do I need to change the spark plug wires?

Short answer: Yep. Find out how to troubleshoot spark plug wire problems and check out how to replace spark plug wires.

Do you change your own spark plugs and wires? Share your tips and tricks. Leave us a comment.